DEV: Remove ember_jquery in most situations (#13237)

In Ember CLI, the vendor bundler includes Ember/jQuery, so this brings
our app closer to that configuration.

We have a couple pages (Reset Password / Confirm New Email) where we need
`ember_jquery` without vendor so the file still exists for those cases.

app/controllers/users_controller.rb

@@ -709,6 +709,7 @@ class UsersController < ApplicationController
   def password_reset_show
     expires_now
     token = params[:token]
+
     password_reset_find_user(token, committing_change: false)
 
     if !@error